Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8118a924284d0aead4baff5385df86f2e2872996d86b9ea6dbdad2958f782e9e' 
  AND token = 'vIDU8MJdUpgXT6sywRcZIf0RkEhrHB30fl2uzVvUG58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}